California could be the next Hawaii. At least when it comes to tobacco restrictions.

Hawaii became the first state in the country to raise the legal smoking age to 21. The new law, which went into effect Jan. 1, makes it illegal for anyone under the age of 21 to buy traditional cigarettes and electronic cigarettes.

On Thursday, lawmakers in California passed a bill to follow in those footsteps. The bill still needs to make it past the governor, but it’s not a huge surprise the Golden State is at the front of this tobacco trend.

Early research indicates it’s working. A study published last year found that in one Massachusetts city, smoking among high school students dropped pretty quickly after the smoking age was bumped up to 21.

So if cities are doing it, people like it and it’s working, why aren’t more states already doing it? It could be in part because where there are proponents, there are opponents.

Some critics claim that by the age of 18, people should be able to decide what they want to do for themselves.